Condensed Consolidated Statements of Changes in Equity - Duke Energy Florida - USD ($) $ in Millions	Total		Duke Energy Florida	Duke Energy Florida Member's Equity	Duke Energy Florida Net Unrealized Gains (Losses) on Available-for-Sale Securities
Beginning balance at Dec. 31, 2022			$ 9,023	$ 9,031	$ (8)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income (loss)	$ 584		463	463
Other comprehensive income (loss)	4	[1]	2		2
Other	(3)
Ending balance at Jun. 30, 2023			9,488	9,494	(6)
Beginning balance at Mar. 31, 2023			9,231	9,237	(6)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income (loss)	(220)		258	258
Other comprehensive income (loss)	(2)	[1]	0
Other	(1)		(1)	(1)
Ending balance at Jun. 30, 2023			9,488	9,494	(6)
Beginning balance at Dec. 31, 2023			10,043	10,048	(5)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income (loss)	2,038		488	488
Other comprehensive income (loss)	(3)	[1]	0
Other	1		19	19
Ending balance at Jun. 30, 2024			10,550	10,555	(5)
Beginning balance at Mar. 31, 2024			10,222	10,227	(5)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income (loss)	900		309	309
Other comprehensive income (loss)	(1)	[1]	0
Other	$ 1		19	19
Ending balance at Jun. 30, 2024			$ 10,550	$ 10,555	$ (5)

[1] Net of income tax benefit of approximately $2 million and income tax expense of $16 million for the three months ended June 30, 2024, and 2023, respectively and approximately $32 million and $9 million of income tax expense for the six months ended June 30, 2024, and 2023, respectively.